just bring a lot of snacks and some alcohol if allowed sit down on a chair and just watch the event maybe talk to some people because you can always learn interesting stuff from new people im sure a few people will come up and blow you and even if you dont get hard its still sort of a power position to feed off maybe youll find a superfeminine tranny and fuck some ass if youre uncomfortable and just leave you wont be seeing them again anyway but trannies go both ways right female biology identify and dress as male thatll probably work for you